US Bridges

M-121 EB over Rush Creek

Fair

Ottawa County, Michigan · 3.7 MI SW of Kent CO Line · Structure no. 000000000008713

Built
1941
84 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
41 ft
1 main span
Daily traffic
7,552
2007 count
Owner
State
State Highway Agency

About this bridge

M-121 EB over Rush Creek is a steel stringer/multi-beam or girder carrying M-121 EB over Rush Creek in Ottawa County, Michigan. It was built in 1941, so it is 84 years old, older than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 7,552 vehicles a day, roughly 8% of them trucks, projected to reach 9,582 by 2018. The structure is 41 ft (12.5 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesM-121 EB
CrossesRush Creek
Location3.7 MI SW of Kent CO Line
RouteState Highway 121
CountyOttawa County
StateMichigan
Coordinates42.88038, -85.84339
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating60.4 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length41 ft (12.5 m)
Longest span41 ft (12.5 m)
Deck width45 ft (13.8 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,552 (2007)
Projected traffic9,582 by 2018
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedDeck replacement with only incidental widening
Estimated improvement cost$30,000
NavigationNo navigation control on waterway

Frequently asked questions

When was M-121 EB over Rush Creek built?

It was built in 1941, making it 84 years old in 2025.

What condition is M-121 EB over Rush Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in April 2024.

How much traffic does M-121 EB over Rush Creek carry?

About 7,552 vehicles per day (2007 count), of which roughly 8% are trucks.

How long is M-121 EB over Rush Creek?

The structure is 41 ft (12.5 m) long with a longest span of 41 ft (12.5 m) and a deck 45 ft wide.

Who owns M-121 EB over Rush Creek?

It is owned by the State Highway Agency.